I would fit in more Nazgul, especially others. Nelya siteswapper is always a nice addition, it makes it so much more versatile. Change the site into
Stewards Tomb, or first play the site that makes him wound 2 companions and then the one that adds 2 to the archery total for each companion over 4.
Can't have 8x Cantea, so you have to adjust that. I would go for 2x
Black Assassin, and 2x Faster than Winds. Threats are always nice.
Ulaire Otsea, Duplicitous Specter, is also nice, card drawing is so good, and makes it even more simple to filter your deck.
I find Nertea from Shadows a way better addition, cause he makes others stronger too under the right circumstances.